You can get a perfect result with the Journeyman setup. The difference is in the depth of the throat clearance of the Master press...and in the ability to control the flaring pressure better. With the JS set, you're using a hammer to lightly apply force for the roll. It works like a charm, but I recommend the MS setup if you're considering doing it a lot over time.

A pic of the first one. Was intended as an experiment to test the oven but it went well so this one worked out. The back part of the toaster oven is hotter so there was 1/2" of the Kydex was a bit shiny. Other than that the forming was smooth.

Some flaring of the opening to allow easier insertion and shaping where the blade locks in for the retention firmness.

One of the biggest parts of the KYDEX® learning curve is figuring out how long to leave your material in the oven to get it just right for forming. We recommend a using an inexpensive laser thermometer for sampling the surface temp. But you can also place some of your material over the edge of the rack and watch for it to start drooping over the side once it starts getting up to forming temperature. The recommended temperature range is 300-325 degrees F. But you may like to work with it slightly warmer or cooler. It's really a personal thing.

Was very thankful for the many You Tube videos out there. Yes, I left part of the kydex on an edge of the rack so when it began to droop checked the temp and it was about 316F. Took note of the visual color from where it was shiny-overcooked. Went by that for the succeeding ones.

A 2 minute toast time with the door partially cracked at the last 30 seconds nails 315F consistently in this oven. Haven't used the thermometer since then. The thermo type plastic is pretty fun to work with for the flexibility to adjust-mold following. Still learning, I have to make some knives to get more practice with.